Customers will likely have to place a box in their windows to convert signals

Verizon Communications Inc. plans to start selling home broadband service over its wireless network in late 2018, a move to challenge the cable industry’s grip on Americans’ internet access.

Verizon said Wednesday it would sell high-speed internet access in three to five cities, starting in Sacramento, Calif. The cities are all expected to be outside Verizon’s existing landline footprint in the Northeast, where it sells high-speed fiber-optic internet called Fios. The company said more details, such as its price, would be...

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